The favicon is shown perfectly in all version of IE in UAT. But once the application pushed to Production, the favicon is not showing in all the version of IE. The source file used is the same. Below are some of the methods I've tried but the favicon still not showing.
<link rel="shortcut icon" href="../Assets/img/favicon.ico?v=2" />
<link rel="shortcut icon" href="../Assets/img/favicon.ico?v=2" type="image/x-icon" />
<link rel="icon" href="../Assets/img/favicon.ico?v=2" />
<link rel="icon" href="../Assets/img/favicon.ico?v=2" type="image/x-icon"/>
(after putting the favicon.ico to root folder)
<link rel="shortcut icon" href="favicon.ico?v=2" type="image/x-icon"/>
<link rel="icon" href="favicon.ico?v=2" type="image/x-icon"/>
<link rel="shortcut icon" href="www.websiteurl.com/favicon.ico?v=2" type="image/x-icon"/>
<link rel="icon" href="www.websiteurl.com/favicon.ico?v=2" type="image/x-icon"/>
The favicon.ico is a valid icon file and it's not just converted from .png file.
What did I missed out here?